ML20082P133
| ML20082P133 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 12/01/1983 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8312080102 | |
| Download: ML20082P133 (2) | |
Text
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o TENNESSEE VAlliis'Y" AUTHORITY
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CH ATTANOOGA. TENNESSEE 3740L 7
400 Chestnut Street Tower II BLRD-50-438/82-49 BLRD-50-439/82-44 U.S. Nuclear Regulatory Commission Region II Attn:
Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - UNDERSIZED FILLET WELDS MADE BEFORE MID-1980 - BLRD-50-438/82-49, BLRD-50-439/82 FOURTH INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. V. Crlenjak on July 22, 1982 in accordance with 10 CFR 50.55(e) as NCR 1888. This was followed by our interim reports dated August 23, 1982 and January 10 and May 2, 1983 Related NCR 1968 has also been determined to be reportable in accordance with 10 CFR 50.55(e). Enclosed is our fourth interim report. We exp%t to submit our next report by June 27, 1984.
If you have any questions concerning this matter, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills, Manager Nuclear Licensing Enclosure cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Records Center (Enclosure)
Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 8312080102 831201 DR ADOCK 05000438 PDR
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1983-TVA SOTH AN NIVERS ARY ggg An Equal Opportumty Emoloyer
ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 UNDERSIZED FILLET WELDS MADE BEFORE MID-1980 NCRs 1888 AND 1868 BLRD-50-438/82-49, BLRD-50-439/82-44 10 CFR 50.55(e)
FOURTH INT 8 RIM REPORT Description of Deficiency Investigations performed, as required by NCR 1173, have disclosed evidence that some of the 1/4 inch and larger fillet welds required on electrical cable tray supports, HVAC duct supports and other miscellaneous structural featups are undersized where visual inspections were made before mid-1980./ The cause of this deficiency can be attributed to craftsmen and
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inspectors not possessing fillet weld gauges to aid in the determination of the proper size of the fillet welds. The use of fillet weld gauges would have provided proper pre-inspection feedback to the craftsmen as to the adequacy of weld size (NCR 1968) and would have allowed the inspector to perform a proper inspection (NCR 1888). Similar deficiencies involving undersized welds have been documented and reported as 10 CFR 50.55(e) items per NCRs 1173, 1188, 1203, and 1563.
After mid-1980, the conditions described above do not exist because of improvements in TVA's quality assurance program for weld inspection. One reason for this was the creation of intensified training and certification programs relating to the visual inspection of welds.
In addition to this, since mid-1980 TVA's attention has been focused to assuring that all weld fabricated structuras are erected and inspected to exact drawing and specification requirements.
Interim Progress All welds identified under the scope of these NCRs were inspected and the results have been forwarded to TVA's Division of Engineering Design (EN DES). EN DES has partially completed the evaluation and disposition of the deficient welds with a determination to "use-as-is" or rework. This information will be forwarded on a continuing systematic basis to TVA's Division of Construction (CONST) for proper resolution.
TVA will provide a final report upon the conclusion of EN DES's evaluation of the affected welds.
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